منابع مشابه
Roughness effect on the Neumann boundary condition
We study the effect of a periodic roughness on a Neumann boundary condition. We show that, as in the case of a Dirichlet boundary condition, it is possible to approach this condition by a more complex law on a domain without rugosity, called wall law. This approach is however different from that usually used in Dirichlet case. In particular, we show that this wall law can be explicitly written ...
متن کاملSpaciousness and Boundary Roughness
This article reports how strongly boundary roughness predicts impressions of spaciousness. In one experiment, 16 rooms with fractal walls were created in CAD simulations and 49 respondents rated the rooms in terms of spaciousness. In a second experiment, 16 respondents rated spaciousness for an additional 12 rooms with different wall systems. Fractal rooms with rough walls were judged as being ...
متن کاملSurface roughness and interfacial slip boundary condition for quartz crystal microbalances
The response of a quartz crystal microbalance ~QCM! is considered using a wave equation for the substrate and the Navier-Stokes equations for a finite liquid layer under a slip boundary condition. It is shown that when the slip length to shear wave penetration depth is small, the first-order effect of slip is only present in the frequency response. Importantly, in this approximation the frequen...
متن کاملRandom-roughness hydrodynamic boundary conditions.
We report results of lattice Boltzmann simulations of a high-speed drainage of liquid films squeezed between a smooth sphere and a randomly rough plane. A significant decrease in the hydrodynamic resistance force as compared with that predicted for two smooth surfaces is observed. However, this force reduction does not represent slippage. The computed force is exactly the same as that between e...
متن کاملNvestigation of a Boundary Layer Problem for Perturbed Cauchy-Riemann Equation with Non-local Boundary Condition
Boundary layer problems (Singular perturbation problems) more have been applied for ordinary differential equations. While this theory for partial differential equations have many applications in several fields of physics and engineering. Because of complexity of limit and boundary behavior of the solutions of partial differential equations these problems considered less than ordinary case. In ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 1995
ISSN: 0022-1120,1469-7645
DOI: 10.1017/s0022112095003600